Answer:
The equations are:


Step-by-step explanation:
Given
See attachment for triangle
Required
Select all true equations
From the attachment:


Using Pythagoras theorem:

This can be rewritten as:

or

or

Answer:
No, because that would be 4%.
Step-by-step explanation:
400/1000 is 40%, and 40/100 is 40%.
Answer:
This is an equilateral triangle so it must also be equiangular. A triangle must have 180 degrees and has three angles so 180/3 = 60. Each angle is 60 degrees.
Step-by-step explanation: